This is an automated bi-weekly mailing of the FreeBSD 5.2 open issues list. The live version of this list is available at: http://www.FreeBSD.org/releases/5.2R/todo.html Automated mailing of this list will continue through the release of FreeBSD 5.2. FreeBSD 5.2 Open Issues Open Issues This is a list of open issues that need to be resolved for FreeBSD 5.2. If you have any updates for this list, please e-mail re_at_FreeBSD.org. Show stopper defects for 5.2-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |-----------------+-------------+----------------+-----------------------| | Panic when | | | The panic reported in | | rebuilding | -- | -- | PR kern/58228 must be | | ata-raid arrays | | | fixed. | |-----------------+-------------+----------------+-----------------------| | | | | Performing a | | | | | crashdump on an ATA | | ATAng crashdump | | So/ren Schmidt | device can result in | | causes disk | In Progress | Tor Egge | a corrupted MBR | | corruption | | | record. Tor has a | | | | | possible patch for | | | | | this. | |-----------------+-------------+----------------+-----------------------| | | | | Kris Kennaway reports | | | | | that Alpha packages | | pipe/VM | | | builds are being | | corruption on | -- | -- | silently corrupted | | Alpha | | | and suspects pipe and | | | | | vm issues. This must | | | | | be investigated and | | | | | resolved. | |-----------------+-------------+----------------+-----------------------| | | | | The panic reported in | | Lingering PSE | | | PR kern/58787 is | | instability | -- | -- | likely related to PSE | | | | | problems and must be | | | | | fixed. | +------------------------------------------------------------------------+ Required features for 5.2-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |-----------------+--------------+---------------+-----------------------| | | | | Kernel and userland | | | | | bits are implemented | | KSE support for | In progress | Jake | but untested and | | sparc64 | | Burkholder | known to be | | | | | incomplete. Required | | | | | for 5.2-RELEASE. | |-----------------+--------------+---------------+-----------------------| | | | | Userland bits | | KSE support for | | Marcel | implemented, kernel | | alpha | In progress. | Moolenaar | bits not implemented. | | | | | Required for | | | | | 5.2-RELEASE. | |-----------------+--------------+---------------+-----------------------| | | | | Significant parts of | | | | | the network stack | | | | | (especially IPv4 and | | | | | IPv6) now have | | | | | fine-grained locking | | | | | of their data | | | | | structures. However, | | | | | it is not yet | | | | | possible for the | | | | | netisr threads to run | | Fine-grained | | | without Giant, due to | | network stack | | | dependencies on | | locking without | In progress | Sam Leffler | sockets, routing, | | Giant | | | etc. A 5.2-RELEASE | | | | | goal is to have the | | | | | network stack running | | | | | largely without | | | | | Giant, which should | | | | | substantially improve | | | | | performance of the | | | | | stack, as well as | | | | | other system | | | | | components by | | | | | reducing contention | | | | | on Giant. | |-----------------+--------------+---------------+-----------------------| | | | | Brian Feldman has | | | | | submitted patches to | | | | | improve the | | | | | consistency of the | | MAC Framework | | | pathnames passed into | | devfs path | In progress | Robert Watson | the MAC Framework | | fixes | | | devfs labeling entry | | | | | points. These patches | | | | | need to be thoroughly | | | | | reviewed and tested, | | | | | then merged. | |-----------------+--------------+---------------+-----------------------| | | | | Many systems | | | | | supporting POSIX.1e | | | | | ACLs permit a minor | | | | | violation to that | | | | | specification, in | | | | | which the ACL_MASK | | ACL_MASK | | | entry overrides the | | override of | In progress | Robert Watson | umask, rather than | | umask support | | | being intersected | | in UFS | | | with it. The | | | | | resulting semantics | | | | | can be useful in | | | | | group-oriented | | | | | environments, and as | | | | | such would be very | | | | | helpful on FreeBSD. | +------------------------------------------------------------------------+ Desired features for 5.2-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |--------------------+-----------+----------------+----------------------| | | | | Sysinstall and | | | | | libdisk need to be | | | | | overhauled to | | GPT support for | -- | -- | support the GPT | | sysinstall | | | partition scheme. | | | | | This is required for | | | | | installing ia64 with | | | | | sysinstall. | |--------------------+-----------+----------------+----------------------| | | | | The PCM audio | | | | | framework and device | | | | | drivers have been | | | | | locked and free of | | | | | Giant for quite a | | PCM locking and | | | while, but LOR | | performance issues | -- | -- | problems persist | | | | | along with reports | | | | | of poor audio | | | | | performance under | | | | | load. The locking | | | | | needs to be reviewed | | | | | and corrected. | |--------------------+-----------+----------------+----------------------| | | | | FAST_IPSEC currently | | | | | cannot be used | | | | | directly with the | | | | | KAME IPv6 | | | | | implementation, | | | | | requiring an | | | | | additional level of | | | | | IP tunnel | | | | | indirection to | | | | | protect IPv6 packets | | | | | when using hardware | | FAST_IPSEC and | -- | -- | crypto acceleration. | | KAME compatibility | | | This issue must be | | | | | resolved so that the | | | | | two services may | | | | | more easily be used | | | | | together. Among | | | | | other things, this | | | | | will require a | | | | | careful review of | | | | | the handling of mbuf | | | | | header copying and | | | | | m_tag support in the | | | | | KAME IPv6 code. | |--------------------+-----------+----------------+----------------------| | | | | The FreeBSD KAME | | | | | IPv6 code is now | | | | | substantially dated | | | | | with respect to the | | KAME | In | | KAME vendor source. | | Synchronization | progress | Hajimu UMEMOTO | The FreeBSD Project | | | | | needs to take | | | | | initiative in | | | | | driving the merge of | | | | | new bug fixes, | | | | | features, et al. | |--------------------+-----------+----------------+----------------------| | | | | Almost all process | | | | | debugging tools have | | | | | been updated to use | | | | | non-procfs kernel | | | | | primitives, with the | | | | | exception of | | | | | truss(1). As procfs | | | | | is considered | | | | | deprecated due to | | truss support for | In | | its inherent | | ptrace | progress | Robert Drehmel | security risks, it | | | | | is highly desirable | | | | | to update truss to | | | | | operate in a | | | | | post-procfs world. | | | | | Dag-Erling Smorgrav | | | | | had prototype | | | | | patches; | | | | | Robert Drehmel is | | | | | developing and | | | | | testing patches now. | |--------------------+-----------+----------------+----------------------| | | | | Apple's Darwin | | | | | operating system has | | | | | fairly extensive | | Merge of Darwin | | | improvements to | | msdosfs, other | -- | -- | msdosfs and other | | fixes | | | kernel services; | | | | | these fixes must be | | | | | reviewed and merged | | | | | to the FreeBSD tree. | |--------------------+-----------+----------------+----------------------| | | | | Productionable | | | | | support for the | | | | | AMD64 platform. It | | | | | currently meets most | | Tier-1 Support for | In | Peter Wemm, | of the requirements | | AMD64 Hammer | progress | David O'Brien | for the Tier-1 | | | | | classification, but | | | | | a formal ruling must | | | | | be made in time for | | | | | 5.2-RELEASE. | |--------------------+-----------+----------------+----------------------| | | | | Kernel modules are | | | | | currently built | | | | | independently from a | | | | | kernel | | | | | configuration, and | | | | | independently from | | | | | one another, | | | | | resulting in | | | | | substantially | | | | | redundant | | | | | compilation of | | | | | objects, as well as | | | | | the inability to | | | | | easily manage | | | | | compile-time options | | | | | for kernel objects | | Revised kld build | -- | -- | (such as MAC, PAE, | | infrastructure | | | etc) that may | | | | | require conditional | | | | | compilation in the | | | | | kernel modules. In | | | | | order to improve | | | | | build performance | | | | | and better support | | | | | options of this | | | | | sort, the KLD build | | | | | infrastructure needs | | | | | to be revamped. | | | | | Peter Wemm has done | | | | | some initial | | | | | prototyping, and | | | | | should be contacted | | | | | before starting on | | | | | this work. | |--------------------+-----------+----------------+----------------------| | | | | Currently, there are | | | | | two classes of | | | | | interrupt handlers | | | | | in 5.x: fast | | | | | interrupt handlers | | | | | which run entirely | | | | | in interrupt | | | | | context, and | | | | | heavy-weight | | | | | handlers which | | | | | execute in a | | | | | full-weight kernel | | | | | interrupt thread. It | | | | | is possible to | | | | | optimize interrupt | | | | | thread context | | | | | management such that | | | | | a light-weight | | | | | context switch is | | | | | performed to begin | | | | | execution of the | | | | | interrupt thread in | | | | | the handler context, | | Light-weight | | | and only when a | | interrupt threads, | -- | -- | full-weight context | | context switches | | | is required (such as | | | | | sleeping on a lock) | | | | | is that cost | | | | | required. This | | | | | optimization should | | | | | substantially | | | | | improve interrupt | | | | | latency. There are | | | | | also additional | | | | | kernel thread | | | | | context switch | | | | | optimizations that | | | | | can be made to | | | | | improve the | | | | | performance of | | | | | thread workers in | | | | | the kernel, such as | | | | | found in the network | | | | | stack, crypto worker | | | | | threads, and GEOM. | | | | | Bosko Milekic has | | | | | done substantial | | | | | prototyping work, | | | | | and should be | | | | | coordinated with. | |--------------------+-----------+----------------+----------------------| | | | | The existing APIC | | | | | interrupt code does | | | | | not support PCI | | Complete the APIC | | | interrupt routing | | PCI interrupt | In | John Baldwin | properly. As a | | routing support | progress | | result, PCI | | | | | interrupts cannot be | | | | | routed either via | | | | | ACPI or across | | | | | PCI-PCI bridges. | |--------------------+-----------+----------------+----------------------| | | | | Currently, gbde must | | | | | be manually | | | | | configured at | | | | | run-time each time | | | | | an encrypted disk | | | | | device is mounted. | | | | | This prevents easy | | Run-time | | | integration into | | autoconfiguration | -- | -- | /etc/fstab and easy | | of GBDE and | | | automated | | related transforms | | | deployment. Improved | | | | | integration with the | | | | | configuration, | | | | | mounting, and boot | | | | | process is required | | | | | to make this feature | | | | | more easily | | | | | accessible. | |--------------------+-----------+----------------+----------------------| | | | | A process cannot be | | | | | interrupted while | | | | | waiting on a lock. | | rpc.lockd(8) | In | | Fixing this requires | | stability | progress | Robert Watson | that the RPC code be | | | | | taught how to deal | | | | | with lock | | | | | cancellation and | | | | | interruption events. | |--------------------+-----------+----------------+----------------------| | | | | Truss appears to | | | | | contain a race | | | | | condition during the | | | | | start-up of | | | | | debugging, which can | | | | | result in truss | | | | | failing to attach to | | | | | the process before | | | | | it exits. The | | | | | symptom is that | | | | | truss reports that | | | | | it cannot open the | | | | | procfs node | | | | | supporting the | | | | | process being | | | | | debugged. A bug also | | Race conditions in | Errata | Robert Drehmel | appears to exist | | truss | candidate | | where in truss will | | | | | hang if execve() | | | | | returns ENOENT. A | | | | | further race appears | | | | | to exist in which | | | | | truss will return | | | | | "PIOCWAIT: | | | | | Input/output error" | | | | | occasionally on | | | | | startup. The fix for | | | | | this sufficiently | | | | | changes process | | | | | execution handling | | | | | that we will defer | | | | | the fix to post-5.0 | | | | | and consider this | | | | | errata. | |--------------------+-----------+----------------+----------------------| | gdb -k support for | -- | Mark Peek | gdb -k doesn't work | | alpha | | | on alpha | |--------------------+-----------+----------------+----------------------| | | | | Currently, MAC | | | | | protections are | | | | | enforced only on | | | | | locally originated | | | | | file system | | | | | operations (VOPs), | | | | | and not on RPCs | | | | | generated via the | | | | | NFS server. | | MAC support for | | | Improvements in NFS | | NFS Server | -- | Robert Watson | server credential | | | | | handling are | | | | | required to correct | | | | | this problem, as | | | | | well as the | | | | | introduction of new | | | | | entry points to | | | | | properly label NFS | | | | | credentials and | | | | | perform enforcement | | | | | properly. | |--------------------+-----------+----------------+----------------------| | | | | All PCI drivers must | | | | | use busdma for DMA; | | | | | no use of vtophys() | | busdma in all PCI | -- | -- | will be permitted | | drivers | | | for any recent | | | | | device driver. ISA | | | | | drivers may be | | | | | exempt. | |--------------------+-----------+----------------+----------------------| | | | | With improved | | | | | support for | | | | | threading | | | | | primitives, support | | | | | is now required to | | | | | ease debugging of | | GDB thread support | -- | -- | threaded | | | | | applications. | | | | | Ideally, this | | | | | support will work | | | | | for both libthr and | | | | | libkse threading | | | | | models. | |--------------------+-----------+----------------+----------------------| | | | | Prebinding reduces | | | | | executable startup | | | | | time by lowering the | | | | | expense of symbol | | | | | lookup, binding and | | | | | relocation. This is | | | | | accomplished by a | | | | | prebinding data file | | | | | or ELF segment that | | | | | contains | | | | | intermediate lookup | | | | | results allowing | | | | | fast symbol binding | | | | | and relocation, | | | | | provided that | | Per object ELF | In | | dependent objects | | Prebinding support | progress | Matthew Dodd | remain unchanged | | | | | since the prebinding | | | | | information was | | | | | generated. | | | | | | | | | | The benefits of | | | | | prebinding are | | | | | realized when | | | | | running executables | | | | | that use a large | | | | | (>10) number of | | | | | shared libraries. | | | | | C++ applications | | | | | also benefit as they | | | | | contain a large | | | | | number of | | | | | relocations. | |--------------------+-----------+----------------+----------------------| | | | | The LOR reported in | | | | | PR kern/55175 needs | | filedesc LOR | -- | -- | to be fixed. | | | | | Filedesc locking | | | | | needs to be heavily | | | | | reviewed in general. | +------------------------------------------------------------------------+ Documentation items that must be resolved for 5.2 +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |---------------+--------+---------------+-------------------------------| | Bluetooth | | | It'd be nice to have some | | documentation | -- | Pav Lucistnik | Bluetooth documentation for | | | | | the Handbook. | +------------------------------------------------------------------------+ Testing focuses for 5.2-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |---------------+----------+----------------+----------------------------| | ATA driver | | | New ATA model has arrived, | | structural | | | supporting fine-grained | | improvements, | Complete | So/ren Schmidt | locking, and more. Much | | MPsafety | | | testing is needed to | | | | | ensure no regressions. | +------------------------------------------------------------------------+ ---------------------------------------------------------------------- home | contact | legal | (c) 1995-2003 The FreeBSD Project. All rights reserved. Last modified: 2003/11/01 05:39:10Received on Sat Nov 01 2003 - 06:01:43 UTC
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